Colonel Thomas Bull was a patriot and Revolutionary War hero who commanded the Chester County Flying Camp militia regiment in American efforts to repel the British occupation of New York City. Captured after the surrender of Fort Washington, he was sent to infamous British prison ships in Brooklyn Harbor, then paroled and returned to manage nearby Warwick Furnace, an important iron works that supplied cannon and shot to the Continental Army. He was a member of the conventions that drafted the federal and state constitutions in 1787-90, served as a presidential elector in 1792, and represented Chester and Delaware Counties in the state assembly from 1793-1801. He was instrumental in establishing the Conestoga Turnpike and, as a mason, built St. Mary’s Church in Warwick Township, his own Mount Pleasant mansion across the road in 1784, this barn, saw and grist mills, a blacksmith shop, and other buildings along French Creek near the intersection of his roads, now Routes 345 and 401; together these buildings were known as Bulltown.